A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
x). What is the velocity of the wave?
A. 450 m/s in the - y direction
B. 333 m/s in the + y direction
C. 333 m/s in the + x direction
D. 167 m/s in the - x direction
E. 167 m/s in the + x direction
E. 167 m/s in the + x direction
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A watermelon is a good example of
a. a compound. b. an element. c. a homogeneous mixture. d. a heterogeneous mixture.
A steel pipe (E 5 190 GPa, ? 5 14 3 1026/°C, column d2 5 82 mm, and d1 5 70 mm) of length L 5 4.25 m is subjected to a temperature increase DT. The column is pinned at the top and fixed at the bottom. The temperature increase at which the column will buckle is approximately:
(A) 36 8C
(B) 42 8C
(C) 54 8C
(D) 58 8C
What do "kiloton" and "megaton" refer to?
a. explosive yields of nuclear weapons b. kiloton means 1000 tons of TNT c. megaton means one million tons of TNT d. all of the above
Aluminum has a positive coefficient of thermal expansion. Consider a round hole that has been drilled in a large sheet of aluminum. As the temperature increases and the surrounding metal expands, the hole diameter will
A) increase. B) decrease. C) remain constant. D) depends how much metal surrounds the hole